The Maine Boundary Line Agreement refers to a legal agreement that resolves boundary disputes and defines the territorial limits between the US state of Maine and neighboring Canadian provinces. It is primarily concerned with demarcating the boundary line, ensuring clarity and avoiding conflicts over land jurisdiction. One significant Maine Boundary Line Agreement is the Webster-Ashburton Treaty of 1842. This treaty, signed by the United States and the United Kingdom, set the northeastern boundary between Maine and the British colony of New Brunswick (now part of Canada). It was named after the American Secretary of State Daniel Webster and the British diplomat Alexander Baring, 1st Baron Ashburn. The Webster-Ashburton Treaty resolved several longstanding boundary disputes, including the critical issue of the exact location of the Maine-New Brunswick border. The agreement established the northern boundary of Maine, particularly along the St. John River and the surrounding area. It also confirmed the boundary line separating Maine from the British colony of Canada (later known as Canada). The treaty established a commission responsible for surveying and marking the boundary line. The commission used natural landmarks, such as rivers and mountains, to determine the precise location of the line. The Webster-Ashburton Treaty played a crucial role in ending disputes and tensions over the territory, providing a clear boundary for both countries. Another relevant Maine Boundary Line Agreement is the Hay-Herbert Treaty of 1903. This treaty focused on the maritime boundary between the US state of Maine and the Canadian province of New Brunswick in the Bay of Fundy and the Gulf of Maine. It was named after the American Secretary of State John Hay and the British Ambassador to the United States Sir Michael Herbert. The Hay-Herbert Treaty clarified the maritime boundaries, ensuring the rights and jurisdiction of both countries' coastal waters. It identified specific points and lines in the waters of the Gulf of Maine, clearly demarcating the areas under US and Canadian control. In summary, the Maine Boundary Line Agreement, including prominent treaties like the Webster-Ashburton Treaty of 1842 and the Hay-Herbert Treaty of 1903, are essential legal agreements that resolve territorial disputes and establish clear boundaries between the US state of Maine and Canadian provinces. These agreements guarantee peaceful coexistence and delineate land and maritime jurisdictions between the nations involved.